Lawn - Dark Green Tufts - Knowledgebase Question

We moved into a new house last October and the builders put in the lawn. We now have dark green 'tufts' that grow quicker than the grass and look unsightly. Do you know what they are and what to do about them ?

I can't tell without looking at it but I suspect the clumps of grass are a native grass, which is weedy in your turf. Digging it out roots and all is the best control strategy because any herbicide you use to kill off the clumping grass will kill your turf, as well. Once you have a clump removed, bag it up and take it to your local Master Gardener clinic or cooperative extension office for identification. Helpful folks there can suggest control remedies. Contact: Brazoria County Extension Office,
21017 County Road 171, Precinct 2 (Old Armory), Angleton, TX 77515 Phone: 979-864-1558.